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| author | Jan-Simon Möller <dl9pf@gmx.de> | 2012-07-02 12:54:28 +0200 |
|---|---|---|
| committer | Behan Webster <behanw@converseincode.com> | 2014-10-14 10:51:23 +0200 |
| commit | ea0e0de69fc413aa80dbf1ec1fb9702ea1b6faca (patch) | |
| tree | eaf66f02ff3614bb87a60e1ce17b8125ef67dc82 /lib | |
| parent | ffb32e973eb5105ec55e0bbf2e77a1ea4a7a123a (diff) | |
| download | lwn-ea0e0de69fc413aa80dbf1ec1fb9702ea1b6faca.tar.gz lwn-ea0e0de69fc413aa80dbf1ec1fb9702ea1b6faca.zip | |
crypto: LLVMLinux: Remove VLAIS usage from libcrc32c.c
Replaced the use of a Variable Length Array In Struct (VLAIS) with a C99
compliant equivalent. This patch allocates the appropriate amount of memory
using a char array using the SHASH_DESC_ON_STACK macro.
The new code can be compiled with both gcc and clang.
Signed-off-by: Jan-Simon Möller <dl9pf@gmx.de>
Signed-off-by: Behan Webster <behanw@converseincode.com>
Reviewed-by: Mark Charlebois <charlebm@gmail.com>
Acked-by: Herbert Xu <herbert@gondor.apana.org.au>
Cc: pageexec@freemail.hu
Cc: "David S. Miller" <davem@davemloft.net>
Diffstat (limited to 'lib')
| -rw-r--r-- | lib/libcrc32c.c | 16 |
1 files changed, 7 insertions, 9 deletions
diff --git a/lib/libcrc32c.c b/lib/libcrc32c.c index b3131f5cf8a2..6a08ce7d6adc 100644 --- a/lib/libcrc32c.c +++ b/lib/libcrc32c.c @@ -41,20 +41,18 @@ static struct crypto_shash *tfm; u32 crc32c(u32 crc, const void *address, unsigned int length) { - struct { - struct shash_desc shash; - char ctx[crypto_shash_descsize(tfm)]; - } desc; + SHASH_DESC_ON_STACK(shash, tfm); + u32 *ctx = (u32 *)shash_desc_ctx(shash); int err; - desc.shash.tfm = tfm; - desc.shash.flags = 0; - *(u32 *)desc.ctx = crc; + shash->tfm = tfm; + shash->flags = 0; + *ctx = crc; - err = crypto_shash_update(&desc.shash, address, length); + err = crypto_shash_update(shash, address, length); BUG_ON(err); - return *(u32 *)desc.ctx; + return *ctx; } EXPORT_SYMBOL(crc32c); |